bindings: add Rust
This commit is contained in:
Nguyen Anh Quynh
784
bindings/rust/src/lib.rs
Normal file
784
bindings/rust/src/lib.rs
Normal file
@ -0,0 +1,784 @@
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//! Bindings for the Unicorn emulator.
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//!
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//!
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//!
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//! # Example use
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//!
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//! ```rust
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//!
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//! use unicorn::RegisterARM;
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//! use unicorn::unicorn_const::{Arch, Mode, Permission, SECOND_SCALE};
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//!
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//! fn main() {
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//! let arm_code32: Vec<u8> = vec![0x17, 0x00, 0x40, 0xe2]; // sub r0, #23
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//!
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//! let mut unicorn = unicorn::Unicorn::new(Arch::ARM, Mode::LITTLE_ENDIAN).expect("failed to initialize Unicorn instance");
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//! let mut emu = unicorn.borrow();
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//! emu.mem_map(0x1000, 0x4000, Permission::ALL).expect("failed to map code page");
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//! emu.mem_write(0x1000, &arm_code32).expect("failed to write instructions");
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//!
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//! emu.reg_write(RegisterARM::R0 as i32, 123).expect("failed write R0");
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//! emu.reg_write(RegisterARM::R5 as i32, 1337).expect("failed write R5");
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//!
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//! let _ = emu.emu_start(0x1000, (0x1000 + arm_code32.len()) as u64, 10 * SECOND_SCALE, 1000);
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//! assert_eq!(emu.reg_read(RegisterARM::R0 as i32), Ok(100));
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//! assert_eq!(emu.reg_read(RegisterARM::R5 as i32), Ok(1337));
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//! }
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//! ```
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//!
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mod ffi;
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pub mod unicorn_const;
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mod arm;
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mod arm64;
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mod m68k;
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mod mips;
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mod ppc;
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mod sparc;
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mod x86;
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pub use crate::{arm::*, arm64::*, m68k::*, mips::*, ppc::*, sparc::*, x86::*};
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use ffi::uc_handle;
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use std::collections::HashMap;
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use std::ffi::c_void;
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use std::marker::PhantomPinned;
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use std::pin::Pin;
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use unicorn_const::*;
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#[derive(Debug)]
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pub struct Context {
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context: ffi::uc_context,
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}
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impl Context {
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pub fn new() -> Self {
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Context { context: 0 }
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}
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pub fn is_initialized(&self) -> bool {
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self.context != 0
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}
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}
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impl Drop for Context {
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fn drop(&mut self) {
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unsafe { ffi::uc_context_free(self.context) };
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}
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}
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#[derive(Debug)]
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/// A Unicorn emulator instance.
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pub struct Unicorn {
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inner: Pin<Box<UnicornInner>>,
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}
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#[derive(Debug)]
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/// Handle used to safely access exposed functions and data of a Unicorn instance.
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pub struct UnicornHandle<'a> {
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inner: Pin<&'a mut UnicornInner>,
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}
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/// Internal Management struct
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pub struct UnicornInner {
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pub uc: uc_handle,
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pub arch: Arch,
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pub code_hooks: HashMap<*mut libc::c_void, Box<ffi::CodeHook>>,
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pub block_hooks: HashMap<*mut libc::c_void, Box<ffi::BlockHook>>,
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pub mem_hooks: HashMap<*mut libc::c_void, Box<ffi::MemHook>>,
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pub intr_hooks: HashMap<*mut libc::c_void, Box<ffi::InterruptHook>>,
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pub insn_in_hooks: HashMap<*mut libc::c_void, Box<ffi::InstructionInHook>>,
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pub insn_out_hooks: HashMap<*mut libc::c_void, Box<ffi::InstructionOutHook>>,
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pub insn_sys_hooks: HashMap<*mut libc::c_void, Box<ffi::InstructionSysHook>>,
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_pin: PhantomPinned,
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}
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impl Unicorn {
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/// Create a new instance of the unicorn engine for the specified architecture
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/// and hardware mode.
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pub fn new(arch: Arch, mode: Mode) -> Result<Unicorn, uc_error> {
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let mut handle = std::ptr::null_mut();
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let err = unsafe { ffi::uc_open(arch, mode, &mut handle) };
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if err == uc_error::OK {
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Ok(Unicorn {
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inner: Box::pin(UnicornInner {
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uc: handle,
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arch: arch,
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code_hooks: HashMap::new(),
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block_hooks: HashMap::new(),
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mem_hooks: HashMap::new(),
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intr_hooks: HashMap::new(),
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insn_in_hooks: HashMap::new(),
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insn_out_hooks: HashMap::new(),
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insn_sys_hooks: HashMap::new(),
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_pin: std::marker::PhantomPinned,
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}),
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})
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} else {
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Err(err)
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}
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}
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pub fn borrow<'a>(&'a mut self) -> UnicornHandle<'a> {
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UnicornHandle {
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inner: self.inner.as_mut(),
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}
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}
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}
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impl Drop for Unicorn {
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fn drop(&mut self) {
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unsafe { ffi::uc_close(self.inner.uc) };
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}
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}
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impl std::fmt::Debug for UnicornInner {
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fn fmt(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(formatter, "Unicorn {{ uc: {:p} }}", self.uc)
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}
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}
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impl<'a> UnicornHandle<'a> {
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/// Return the architecture of the current emulator.
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pub fn get_arch(&self) -> Arch {
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self.inner.arch
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}
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/// Returns a vector with the memory regions that are mapped in the emulator.
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pub fn mem_regions(&self) -> Result<Vec<MemRegion>, uc_error> {
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let mut nb_regions: u32 = 0;
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let mut p_regions: *const MemRegion = std::ptr::null_mut();
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let err = unsafe { ffi::uc_mem_regions(self.inner.uc, &mut p_regions, &mut nb_regions) };
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if err == uc_error::OK {
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let mut regions = Vec::new();
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for i in 0..nb_regions {
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regions.push(unsafe { std::mem::transmute_copy(&*p_regions.offset(i as isize)) });
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}
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unsafe { libc::free(p_regions as _) };
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Ok(regions)
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} else {
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Err(err)
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}
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}
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/// Read a range of bytes from memory at the specified address.
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pub fn mem_read(&self, address: u64, buf: &mut [u8]) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_mem_read(self.inner.uc, address, buf.as_mut_ptr(), buf.len()) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Return a range of bytes from memory at the specified address as vector.
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pub fn mem_read_as_vec(&self, address: u64, size: usize) -> Result<Vec<u8>, uc_error> {
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let mut buf = vec![0; size];
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let err = unsafe { ffi::uc_mem_read(self.inner.uc, address, buf.as_mut_ptr(), size) };
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if err == uc_error::OK {
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Ok(buf)
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} else {
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Err(err)
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}
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}
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pub fn mem_write(&mut self, address: u64, bytes: &[u8]) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_mem_write(self.inner.uc, address, bytes.as_ptr(), bytes.len()) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Map an existing memory region in the emulator at the specified address.
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///
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/// This function is marked unsafe because it is the responsibility of the caller to
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/// ensure that `size` matches the size of the passed buffer, an invalid `size` value will
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/// likely cause a crash in unicorn.
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///
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/// `address` must be aligned to 4kb or this will return `Error::ARG`.
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///
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/// `size` must be a multiple of 4kb or this will return `Error::ARG`.
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///
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/// `ptr` is a pointer to the provided memory region that will be used by the emulator.
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pub fn mem_map_ptr(
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&mut self,
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address: u64,
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size: usize,
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perms: Permission,
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ptr: *mut c_void,
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) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_mem_map_ptr(self.inner.uc, address, size, perms.bits(), ptr) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Map a memory region in the emulator at the specified address.
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///
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/// `address` must be aligned to 4kb or this will return `Error::ARG`.
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/// `size` must be a multiple of 4kb or this will return `Error::ARG`.
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pub fn mem_map(
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&mut self,
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address: u64,
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size: libc::size_t,
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perms: Permission,
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) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_mem_map(self.inner.uc, address, size, perms.bits()) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Unmap a memory region.
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///
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/// `address` must be aligned to 4kb or this will return `Error::ARG`.
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/// `size` must be a multiple of 4kb or this will return `Error::ARG`.
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pub fn mem_unmap(&mut self, address: u64, size: libc::size_t) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_mem_unmap(self.inner.uc, address, size) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Set the memory permissions for an existing memory region.
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///
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/// `address` must be aligned to 4kb or this will return `Error::ARG`.
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/// `size` must be a multiple of 4kb or this will return `Error::ARG`.
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pub fn mem_protect(
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&mut self,
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address: u64,
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size: libc::size_t,
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perms: Permission,
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) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_mem_protect(self.inner.uc, address, size, perms.bits()) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Write an unsigned value from a register.
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pub fn reg_write<T: Into<i32>>(&mut self, regid: T, value: u64) -> Result<(), uc_error> {
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let err =
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unsafe { ffi::uc_reg_write(self.inner.uc, regid.into(), &value as *const _ as _) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Write variable sized values into registers.
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///
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/// The user has to make sure that the buffer length matches the register size.
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/// This adds support for registers >64 bit (GDTR/IDTR, XMM, YMM, ZMM (x86); Q, V (arm64)).
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pub fn reg_write_long<T: Into<i32>>(&self, regid: T, value: Box<[u8]>) -> Result<(), uc_error> {
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let err = unsafe { ffi::uc_reg_write(self.inner.uc, regid.into(), value.as_ptr() as _) };
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if err == uc_error::OK {
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Ok(())
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} else {
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Err(err)
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}
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}
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/// Read an unsigned value from a register.
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///
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/// Not to be used with registers larger than 64 bit.
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pub fn reg_read<T: Into<i32>>(&self, regid: T) -> Result<u64, uc_error> {
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let mut value: u64 = 0;
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let err =
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unsafe { ffi::uc_reg_read(self.inner.uc, regid.into(), &mut value as *mut u64 as _) };
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if err == uc_error::OK {
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Ok(value)
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} else {
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Err(err)
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}
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}
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/// Read 128, 256 or 512 bit register value into heap allocated byte array.
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///
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/// This adds safe support for registers >64 bit (GDTR/IDTR, XMM, YMM, ZMM (x86); Q, V (arm64)).
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pub fn reg_read_long<T: Into<i32>>(&self, regid: T) -> Result<Box<[u8]>, uc_error> {
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let err: uc_error;
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let boxed: Box<[u8]>;
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let mut value: Vec<u8>;
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let curr_reg_id = regid.into();
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let curr_arch = self.get_arch();
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if curr_arch == Arch::X86 {
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if curr_reg_id >= x86::RegisterX86::XMM0 as i32
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&& curr_reg_id <= x86::RegisterX86::XMM31 as i32
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{
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value = vec![0; 16];
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} else if curr_reg_id >= x86::RegisterX86::YMM0 as i32
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&& curr_reg_id <= x86::RegisterX86::YMM31 as i32
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{
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value = vec![0; 32];
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} else if curr_reg_id >= x86::RegisterX86::ZMM0 as i32
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&& curr_reg_id <= x86::RegisterX86::ZMM31 as i32
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{
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value = vec![0; 64];
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} else if curr_reg_id == x86::RegisterX86::GDTR as i32
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|| curr_reg_id == x86::RegisterX86::IDTR as i32
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{
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value = vec![0; 10]; // 64 bit base address in IA-32e mode
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} else {
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return Err(uc_error::ARG);
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}
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} else if curr_arch == Arch::ARM64 {
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if (curr_reg_id >= arm64::RegisterARM64::Q0 as i32
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&& curr_reg_id <= arm64::RegisterARM64::Q31 as i32)
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|| (curr_reg_id >= arm64::RegisterARM64::V0 as i32
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&& curr_reg_id <= arm64::RegisterARM64::V31 as i32)
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{
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value = vec![0; 16];
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} else {
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return Err(uc_error::ARG);
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}
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} else {
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return Err(uc_error::ARCH);
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}
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err = unsafe { ffi::uc_reg_read(self.inner.uc, curr_reg_id, value.as_mut_ptr() as _) };
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if err == uc_error::OK {
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boxed = value.into_boxed_slice();
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Ok(boxed)
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} else {
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Err(err)
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}
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}
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/// Read a signed 32-bit value from a register.
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pub fn reg_read_i32<T: Into<i32>>(&self, regid: T) -> Result<i32, uc_error> {
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let mut value: i32 = 0;
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let err =
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unsafe { ffi::uc_reg_read(self.inner.uc, regid.into(), &mut value as *mut i32 as _) };
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if err == uc_error::OK {
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Ok(value)
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} else {
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Err(err)
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}
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}
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/// Add a code hook.
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pub fn add_code_hook<F: 'static>(
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&mut self,
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begin: u64,
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end: u64,
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callback: F,
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) -> Result<ffi::uc_hook, uc_error>
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where
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F: FnMut(UnicornHandle, u64, u32),
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{
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let mut hook_ptr = std::ptr::null_mut();
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let mut user_data = Box::new(ffi::CodeHook {
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unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
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callback: Box::new(callback),
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});
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let err = unsafe {
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ffi::uc_hook_add(
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self.inner.uc,
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&mut hook_ptr,
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HookType::CODE,
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ffi::code_hook_proxy as _,
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user_data.as_mut() as *mut _ as _,
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begin,
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end,
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)
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};
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if err == uc_error::OK {
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unsafe { self.inner.as_mut().get_unchecked_mut() }
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.code_hooks
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.insert(hook_ptr, user_data);
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Ok(hook_ptr)
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} else {
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Err(err)
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}
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}
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/// Add a block hook.
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pub fn add_block_hook<F: 'static>(&mut self, callback: F) -> Result<ffi::uc_hook, uc_error>
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where
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F: FnMut(UnicornHandle, u64, u32),
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||||
{
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let mut hook_ptr = std::ptr::null_mut();
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let mut user_data = Box::new(ffi::BlockHook {
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unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
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callback: Box::new(callback),
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});
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let err = unsafe {
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ffi::uc_hook_add(
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self.inner.uc,
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&mut hook_ptr,
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HookType::BLOCK,
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||||
ffi::block_hook_proxy as _,
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||||
user_data.as_mut() as *mut _ as _,
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1,
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0,
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||||
)
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};
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if err == uc_error::OK {
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unsafe { self.inner.as_mut().get_unchecked_mut() }
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||||
.block_hooks
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.insert(hook_ptr, user_data);
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Ok(hook_ptr)
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||||
} else {
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||||
Err(err)
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||||
}
|
||||
}
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||||
|
||||
/// Add a memory hook.
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||||
pub fn add_mem_hook<F: 'static>(
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||||
&mut self,
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||||
hook_type: HookType,
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||||
begin: u64,
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||||
end: u64,
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||||
callback: F,
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||||
) -> Result<ffi::uc_hook, uc_error>
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||||
where
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||||
F: FnMut(UnicornHandle, MemType, u64, usize, i64),
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||||
{
|
||||
if !(HookType::MEM_ALL | HookType::MEM_READ_AFTER).contains(hook_type) {
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||||
return Err(uc_error::ARG);
|
||||
}
|
||||
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||||
let mut hook_ptr = std::ptr::null_mut();
|
||||
let mut user_data = Box::new(ffi::MemHook {
|
||||
unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
|
||||
callback: Box::new(callback),
|
||||
});
|
||||
|
||||
let err = unsafe {
|
||||
ffi::uc_hook_add(
|
||||
self.inner.uc,
|
||||
&mut hook_ptr,
|
||||
hook_type,
|
||||
ffi::mem_hook_proxy as _,
|
||||
user_data.as_mut() as *mut _ as _,
|
||||
begin,
|
||||
end,
|
||||
)
|
||||
};
|
||||
if err == uc_error::OK {
|
||||
unsafe { self.inner.as_mut().get_unchecked_mut() }
|
||||
.mem_hooks
|
||||
.insert(hook_ptr, user_data);
|
||||
Ok(hook_ptr)
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Add an interrupt hook.
|
||||
pub fn add_intr_hook<F: 'static>(&mut self, callback: F) -> Result<ffi::uc_hook, uc_error>
|
||||
where
|
||||
F: FnMut(UnicornHandle, u32),
|
||||
{
|
||||
let mut hook_ptr = std::ptr::null_mut();
|
||||
let mut user_data = Box::new(ffi::InterruptHook {
|
||||
unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
|
||||
callback: Box::new(callback),
|
||||
});
|
||||
|
||||
let err = unsafe {
|
||||
ffi::uc_hook_add(
|
||||
self.inner.uc,
|
||||
&mut hook_ptr,
|
||||
HookType::INTR,
|
||||
ffi::intr_hook_proxy as _,
|
||||
user_data.as_mut() as *mut _ as _,
|
||||
0,
|
||||
0,
|
||||
)
|
||||
};
|
||||
if err == uc_error::OK {
|
||||
unsafe { self.inner.as_mut().get_unchecked_mut() }
|
||||
.intr_hooks
|
||||
.insert(hook_ptr, user_data);
|
||||
Ok(hook_ptr)
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Add hook for x86 IN instruction.
|
||||
pub fn add_insn_in_hook<F: 'static>(&mut self, callback: F) -> Result<ffi::uc_hook, uc_error>
|
||||
where
|
||||
F: FnMut(UnicornHandle, u32, usize),
|
||||
{
|
||||
let mut hook_ptr = std::ptr::null_mut();
|
||||
let mut user_data = Box::new(ffi::InstructionInHook {
|
||||
unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
|
||||
callback: Box::new(callback),
|
||||
});
|
||||
|
||||
let err = unsafe {
|
||||
ffi::uc_hook_add(
|
||||
self.inner.uc,
|
||||
&mut hook_ptr,
|
||||
HookType::INSN,
|
||||
ffi::insn_in_hook_proxy as _,
|
||||
user_data.as_mut() as *mut _ as _,
|
||||
0,
|
||||
0,
|
||||
x86::InsnX86::IN,
|
||||
)
|
||||
};
|
||||
if err == uc_error::OK {
|
||||
unsafe { self.inner.as_mut().get_unchecked_mut() }
|
||||
.insn_in_hooks
|
||||
.insert(hook_ptr, user_data);
|
||||
Ok(hook_ptr)
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Add hook for x86 OUT instruction.
|
||||
pub fn add_insn_out_hook<F: 'static>(&mut self, callback: F) -> Result<ffi::uc_hook, uc_error>
|
||||
where
|
||||
F: FnMut(UnicornHandle, u32, usize, u32),
|
||||
{
|
||||
let mut hook_ptr = std::ptr::null_mut();
|
||||
let mut user_data = Box::new(ffi::InstructionOutHook {
|
||||
unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
|
||||
callback: Box::new(callback),
|
||||
});
|
||||
|
||||
let err = unsafe {
|
||||
ffi::uc_hook_add(
|
||||
self.inner.uc,
|
||||
&mut hook_ptr,
|
||||
HookType::INSN,
|
||||
ffi::insn_out_hook_proxy as _,
|
||||
user_data.as_mut() as *mut _ as _,
|
||||
0,
|
||||
0,
|
||||
x86::InsnX86::OUT,
|
||||
)
|
||||
};
|
||||
if err == uc_error::OK {
|
||||
unsafe { self.inner.as_mut().get_unchecked_mut() }
|
||||
.insn_out_hooks
|
||||
.insert(hook_ptr, user_data);
|
||||
Ok(hook_ptr)
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Add hook for x86 SYSCALL or SYSENTER.
|
||||
pub fn add_insn_sys_hook<F: 'static>(
|
||||
&mut self,
|
||||
insn_type: x86::InsnSysX86,
|
||||
begin: u64,
|
||||
end: u64,
|
||||
callback: F,
|
||||
) -> Result<ffi::uc_hook, uc_error>
|
||||
where
|
||||
F: FnMut(UnicornHandle),
|
||||
{
|
||||
let mut hook_ptr = std::ptr::null_mut();
|
||||
let mut user_data = Box::new(ffi::InstructionSysHook {
|
||||
unicorn: unsafe { self.inner.as_mut().get_unchecked_mut() } as _,
|
||||
callback: Box::new(callback),
|
||||
});
|
||||
|
||||
let err = unsafe {
|
||||
ffi::uc_hook_add(
|
||||
self.inner.uc,
|
||||
&mut hook_ptr,
|
||||
HookType::INSN,
|
||||
ffi::insn_sys_hook_proxy as _,
|
||||
user_data.as_mut() as *mut _ as _,
|
||||
begin,
|
||||
end,
|
||||
insn_type,
|
||||
)
|
||||
};
|
||||
if err == uc_error::OK {
|
||||
unsafe { self.inner.as_mut().get_unchecked_mut() }
|
||||
.insn_sys_hooks
|
||||
.insert(hook_ptr, user_data);
|
||||
Ok(hook_ptr)
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Remove a hook.
|
||||
///
|
||||
/// `hook` is the value returned by `add_*_hook` functions.
|
||||
pub fn remove_hook(&mut self, hook: ffi::uc_hook) -> Result<(), uc_error> {
|
||||
let handle = unsafe { self.inner.as_mut().get_unchecked_mut() };
|
||||
let err: uc_error;
|
||||
let mut in_one_hashmap = false;
|
||||
|
||||
if handle.code_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.code_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if handle.mem_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.mem_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if handle.block_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.block_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if handle.intr_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.intr_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if handle.insn_in_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.insn_in_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if handle.insn_out_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.insn_out_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if handle.insn_sys_hooks.contains_key(&hook) {
|
||||
in_one_hashmap = true;
|
||||
handle.insn_sys_hooks.remove(&hook);
|
||||
}
|
||||
|
||||
if in_one_hashmap {
|
||||
err = unsafe { ffi::uc_hook_del(handle.uc, hook) };
|
||||
} else {
|
||||
err = uc_error::HOOK;
|
||||
}
|
||||
|
||||
if err == uc_error::OK {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Allocate and return an empty Unicorn context.
|
||||
///
|
||||
/// To be populated via context_save.
|
||||
pub fn context_alloc(&self) -> Result<Context, uc_error> {
|
||||
let mut empty_context: ffi::uc_context = Default::default();
|
||||
let err = unsafe { ffi::uc_context_alloc(self.inner.uc, &mut empty_context) };
|
||||
if err == uc_error::OK {
|
||||
Ok(Context {
|
||||
context: empty_context,
|
||||
})
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Save current Unicorn context to previously allocated Context struct.
|
||||
pub fn context_save(&self, context: &mut Context) -> Result<(), uc_error> {
|
||||
let err = unsafe { ffi::uc_context_save(self.inner.uc, context.context) };
|
||||
if err == uc_error::OK {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Allocate and return a Context struct initialized with the current CPU context.
|
||||
///
|
||||
/// This can be used for fast rollbacks with context_restore.
|
||||
/// In case of many non-concurrent context saves, use context_alloc and *_save
|
||||
/// individually to avoid unnecessary allocations.
|
||||
pub fn context_init(&self) -> Result<Context, uc_error> {
|
||||
let mut new_context: ffi::uc_context = Default::default();
|
||||
let err = unsafe { ffi::uc_context_alloc(self.inner.uc, &mut new_context) };
|
||||
if err != uc_error::OK {
|
||||
return Err(err);
|
||||
}
|
||||
let err = unsafe { ffi::uc_context_save(self.inner.uc, new_context) };
|
||||
if err == uc_error::OK {
|
||||
Ok(Context {
|
||||
context: new_context,
|
||||
})
|
||||
} else {
|
||||
unsafe { ffi::uc_context_free(new_context) };
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Restore a previously saved Unicorn context.
|
||||
///
|
||||
/// Perform a quick rollback of the CPU context, including registers and some
|
||||
/// internal metadata. Contexts may not be shared across engine instances with
|
||||
/// differing arches or modes. Memory has to be restored manually, if needed.
|
||||
pub fn context_restore(&self, context: &Context) -> Result<(), uc_error> {
|
||||
let err = unsafe { ffi::uc_context_restore(self.inner.uc, context.context) };
|
||||
if err == uc_error::OK {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Emulate machine code for a specified duration.
|
||||
///
|
||||
/// `begin` is the address where to start the emulation. The emulation stops if `until`
|
||||
/// is hit. `timeout` specifies a duration in microseconds after which the emulation is
|
||||
/// stopped (infinite execution if set to 0). `count` is the maximum number of instructions
|
||||
/// to emulate (emulate all the available instructions if set to 0).
|
||||
pub fn emu_start(
|
||||
&mut self,
|
||||
begin: u64,
|
||||
until: u64,
|
||||
timeout: u64,
|
||||
count: usize,
|
||||
) -> Result<(), uc_error> {
|
||||
let err = unsafe { ffi::uc_emu_start(self.inner.uc, begin, until, timeout, count as _) };
|
||||
if err == uc_error::OK {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Stop the emulation.
|
||||
///
|
||||
/// This is usually called from callback function in hooks.
|
||||
/// NOTE: For now, this will stop the execution only after the current block.
|
||||
pub fn emu_stop(&mut self) -> Result<(), uc_error> {
|
||||
let err = unsafe { ffi::uc_emu_stop(self.inner.uc) };
|
||||
if err == uc_error::OK {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
|
||||
/// Query the internal status of the engine.
|
||||
///
|
||||
/// supported: MODE, PAGE_SIZE, ARCH
|
||||
pub fn query(&self, query: Query) -> Result<usize, uc_error> {
|
||||
let mut result: libc::size_t = Default::default();
|
||||
let err = unsafe { ffi::uc_query(self.inner.uc, query, &mut result) };
|
||||
if err == uc_error::OK {
|
||||
Ok(result)
|
||||
} else {
|
||||
Err(err)
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user